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Estimating Measurements
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Estimating Measurements
📚 Part 1: Multiple Choice
1. Which is the best estimate for the length of a typical classroom whiteboard?
1 m
2 m
4 m
6 m
2. Which is the best estimate for the area of an A4 sheet (21 cm × 29.7 cm)?
0.06 m²
0.006 m²
0.0006 m²
0.6 m²
3. A 1-litre milk carton has a volume closest to:
100 cm³
1 000 cm³
10 000 cm³
100 000 cm³
4. Check all that make good benchmarks when estimating length:
Width of a standard school ruler (30 cm)
Height of a classroom door (~2 m)
Mass of a 1 kg weight
Length of a standard A4 sheet (29.7 cm)
✏️ Part 2: Short Answers & Practical Checks
5. Estimate the length of a typical school textbook in centimetres. Write your estimate and one strategy you used.
6. You estimated the textbook as _______ cm. It measured 24 cm in reality. Calculate the percentage error of your estimate. Show working.
7. A classroom table is about 1.2 m long and 0.6 m wide. Estimate its area in square metres and explain your method briefly.
8. Practical task (to complete in class or at home): Choose one classroom object. Sketch it, label estimated length, width and an approximate volume (in cm³ or m³). Explain one reason your estimate might be too large or too small.
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